img{
    display: block;
    width: 100%;
    height: 100%;
}
body,head{
    width: 100vw;
    height: 100vh;
    background:url('https://img0.baidu.com/it/u=2193757290,3158000673&fm=253&fmt=auto&app=120&f=JPEG?w=1280&h=800') no-repeat;
    background-size: cover;
    
}
.login{
    width: 260px;
    height: 270px;
    /* border: 1px solid gray; */
    background: rgba(255, 255, 255,0.3);
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate3d(-50%,-50%,0);
    padding: 14px;
    z-index: 100;
}
.site-form-item-icon,.login-form-button{
    width: 100%;
}
